Fireground Operations Flashcards
106 Fireground Operations 106.2 Search and Rescue Above A Fire When are Operations above a fire justifiable ?
1) search for trapped occupants of a burning building 2) search for vertical fire spread 3) protect people trapped on a top floor
106 Fireground Operations 106.2 Search and Rescue Above A Fire Searching above a fire for victims
Unconscious or trapped people as soon as possible during a fire.
106 Fireground Operations 106.2 Search and Rescue Above A Fire Operating above a fire during a shaft fire
-IC must order that the top of the shaft to be vented at the same time a hose line must be placed to extinguish the spread of fire. - ff have to operate at least one or more floors above the fire. - IC must also provide the means of escape, such as an aerial ladder.
106 Fireground Operations 106.2 Search and Rescue Above A Fire Primary Search
When conducting a primary Search above a fire in a building other than non- combustible construction a charged hose line should be taken to the search floor.
106 Fireground Operations 106.2 Search and Rescue Above A Fire Permission Required to Search Above a Fire Without a Hose Line
- most ff are trapped on a floor above a fire because they fail to take a hose line with themwhen conducting the search above a fire. - time is critical to save a civilian and a quick search - only attempted with permission from The IC and with acknowledged communication from the fire attack team that they are aware a search team will be operating above them with a hose line. - IC should be notified so a second line can be deployed as soon as possible.
106 Fireground Operations 106.2 Search and Rescue Above A Fire What is the Attack team responsible for when a search without a hose line is being conducted ?
Responsible for the safety of the search team a) maintaining the fire attack if there is sufficient water flow for extinguishment b) maintaining the search teams means of egress if water flow is marginal or the fire extent is not readily controllable
106 Fireground Operations 106.2 Search and Rescue Above A Fire Search above a fire without a hose line Safety Precautions
1) force open a door to an apartment that’s not directly over the fire. If conditions suddenly get worse in the hallway, the open apartment not over the fire may be your area of refuge. 2) flashover conditions develop, locate a second exit such as a window Leading to a fire escape or portable ladder and immediately exit the building 3) when you climb or descend a stairway between the fire floor and floor above stay close to face the wall. heat, smoke and flame flowing up a stairway will be rising vertically near the stairwell or around the banister. 4) All ff assigned to search above a fire without a line should only do so if there is a real chance to save another persons life. once determined no one is there immediately exit the building.
106 Fireground Operations 106.3 Guidlines for Placement of Hoselines Placement OF The First Attack Hoseline
First attack hoseline is stretched through a front , rear or side doorway. - hose stream nozzle is positioned and used to drive heat, flame and smoke from inside to outside through a vented window or other door or through an opening created by “outside vent ff” - advantage of advancing the first attack line through a door rather than through a window is that unconscious trapped victims are often found inside the door or in the hallway leading from the door to the fire - the next location victims are discovered is in the hallways or corridors leading to an exit.
106 Fireground Operations 106.3 Guidlines for Placement of Hoselines Placement of the second attack hoseline
If there is an exposure problem, such as flame spreading to a nearby structure, the second line goes there. - the exposure problem is most often an inside exposure.
106 Fireground Operations 106.3 Guidlines for Placement of Hoselines The advantages of having a backup, second hoseline, stretched into the burning building right behind the first line are :
1) protect ff operating the first attack line in case o explosion, flashover, or collapse 2) if the first hose suffers a burst length or broken nozzle, the second hose team can move into position and attack the blaze. 3) too much fire, two hoselines working side by side may be successful 4) the first attack team can handle the room and content fire, it is important to get the second line up to the floor above, the attic or an adjoining room to cut off spreading fire. 5) first hoseline goes to the seat of the fire and attacks the fire from a door and pushes the fire outward and protects the interior stairs. 6) second hoseline should back up the first hoseline and if necessary advance to the floor above 7) hoseline should not pass fire 8) when forcing open a door , it is important to control the door and not let it swing open into the flaming apartment.
106 Fireground Operations 106.3 Guidlines for Placement of Hoselines How should hoselines be stretched ?
Hose lines should be stretched in series not parallel. - three or four hoselines stretched at the same time to different locations, this can create a disorganized operation and actually delay water being delivered into the fire.
106 Fireground Operations 106.3 Guidlines for Placement of Hoselines Size- Up The Hose Stretch
After one, two or three hose lines have been stretched into a burning building the ff are advancing them toward the fire, there is no obvious need for another hoseline. - IC should have ff stretch a hoseline to the front of the building and “stand fast” until there is another call for a line. - sudden need for a hoseline to cut off spreading fire in a building, the ff standing fast with the line nearby can quickly take it inside the building. - the advantage of stretching a hose to the front of the building and standing by is that the most time - consuming part of the hose stretch is completed.
106 Fireground Operations 106.3 Guidlines for Placement of Hoselines Hose stretching to supply a standpipe and sprinkler
IC must Size Up a burning building to determine if it has a sprinkler / standpipe system Siamese. If it does the system MUST be supplied with water. - sprinkler system can extinguish a fire quicker and more effectively than ff. - sprinkler head is already in position directly over the fire - water is not impeded or slowed by lock doors, blinding smoke, or failure to locate the fire. If a building has both systems sprinkler and standpipe : - first supply line to the Siamese should go to the standpipe system ( this is to protect ff) - second line connect to sprinkler system.
106.4 Flow Path and Door Control Def Fire
A rapid oxidation process,which is a chemical reaction resulting in the evolution of light and heat in varying intensities.
106.4 Flow Path and Door Control Def Heat Energy
Is a form of energy characterized by vibration of molecules and capable of initiating and supporting chemical changes and changes of state
106.4 Flow Path and Door Control Def Temperature
Is a measure of the degree of molecular activity of a material compared to a reference point. temp is measured in degrees Fahrenheit or Degrees Celsius.
106.4 Flow Path and Door Control Def Heat release rate ( hrr)
Is the rate at which fire releases energy- also known as power Measured in Watts (W)equal to 1 joule per second Depending on the size hrr is also measured in Kilowatts ( equal to 1,000 Watts) or Megawatts ;( equal to 1,000,000 Watts)
106.4 Flow Path and Door Control How does heat always transfer ?
Heat always transfers from the hotter object to the cooler object. - energy transferred increases the objects temp and heat energy transferred from an object decreases the objects temp.
106.4 Flow Path and Door Control Def conduction
Heat transfer within solids or between contacting solids
106.4 Flow Path and Door Control Def convection
Heat transfer of gases or liquids, through natural movement from higher pressure areas to lower pressure areas.
106.4 Flow Path and Door Control Def radiation
Heat transfer by electromagnetic waves
106.4 Flow Path and Door Control Temp as it relates to normal ff
37 C - 98.6 F. Normal human oral / body temperature
106.4 Flow Path and Door Control Traditional Fire Deveopment
Time history of a fuel - limited fire Fire growth is not , limited by a lack of oxygen As more fuel becomes involved in the fire, the energy level continues to increase until all of the fuel available is burning ( fully developed ) As fuel is burned away the energy level begins to decay. The key is oxygen is available to mix with the heated gases (fuel) to enable the completion of the fire triangle ant the generation of energy.
106 Fire Ground Operations 106.4 Flow Path and Door Control Def Flashover
Is in the transition phase in the development of a contained fire in which surfaces exposed to the thermal radiation, from fire gases in excess of 600C, reach ignition temperature more or less simultaneously and fire spreads rapidly through the space. - this is the most dangerous stage of fire
106 Fire Ground Operations 106.4 Flow Path and Door Control Def Backdraft
Fire takes place in a confined area and burns undetected until most of the oxygen within is consumed. The heat continues to produce flammable gases mostly CO. These gases are heated above their ignition temperature. When a supply of oxygen is introduced, as when normal entry points are opened, the gases could ignite with explosive force.
106 Fire Ground Operations 106.4 Flow Path and Door Control Flameove (Rollover)
Is a condition in which unburned fuel from the originating fire has accumulated in the ceiling layer to a sufficient concentration that it ignites and burns. Can occur without ignition of or prior to the ignition of other fuels separate from the origin.
106 Fire Ground Operations 106.4 Flow Path and Door Control What is FlOWPATH ?
The understanding of the movement of fire and the byproducts it will produce. As the temp builds the heated gases will pressurize and will move to areas of lower pressure. Ff must be aware of where the fire is and the route it will take. Not to put themselves between the fire and an area of low pressure or vent point.